Essentially, yes, but...
Check the recompressed RPX.
Iirc, the exact offset of the important byte is 0x463, you should have A0 in there, if not change it to that.
Also, I remember seeing another change in the recompressed rpx.
Two lines of HEX code were being copied right below when they finish, although I don't remember exactly were, all I know is that those duplicated lines didn't affect a thing when launching a recompressed RPX through Loadiine from my tests.
I could I go further into details, but that'd have to wait until tomorrow's afternoon since it's late and will be busy in the morning.
But be sure to let me know if by encrypting them and installing them from the RPL Studio compressed file works or not either way, I'm curious to know since I haven't used it for installable channels.